Information processing apparatus and method of manufacturing information processing apparatus

ABSTRACT

An information processing apparatus includes a circuit board having an electronic device, a first contact and a pin hole; a cover covering the electronic device and the first contact on the circuit board; and a case accommodating the circuit board and the cover. The cover has a second contact being in contact with the first contact, a tampering detection wiring for tampering detection of the cover connected to the second contact, a through hole absorbing dimensional tolerance, and a positioning pin corresponding to the pin hole of the circuit board. The cover is attached to a back face of the case by inserting a predetermined screw into the through hole, and is positioned by inserting the positioning pin into the pin hole on the circuit board.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on and claims priority under 35 USC 119 fromJapanese Patent Application No. 2020-022597 filed on Feb. 13, 2020, thecontents of which are incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to an information processing apparatusand a method of manufacturing an information processing apparatus.

BACKGROUND ART

In recent years, the introduction of settlement terminals that provideelectronic settlements to users has been promoted in stores andcommercial facilities. The settlement terminals handle secretinformation such as a credit card number, identification information ofan IC card, personal information of a user, and a secret key used forencrypting information in the internal processing. Therefore, theinformation processing apparatus that executes the internal processingof the settlement terminal includes a tamperproof mechanism forresisting a physical attack (tamper) from the outside for the purpose ofanalyzing or falsifying secret information.

Patent Literature 1 discloses an information processing apparatusincluding first and second circuit boards disposed on a device main bodyin a state of being separated from each other, electronic componentsdisposed on opposite faces of the first and second circuit boardsrespectively, a shielding member surrounding an outer periphery of thefirst and second circuit boards, and a tamper detection circuit. Thetamper detection circuit erases data in the memory when a hole is formedin the shielding member on which a detection line is formed with a drilland the like. As a result, the secret information in the memory isprevented from being analyzed.

Patent Literature 2 discloses a data storage device includingsufficiently thin electric wires which are wired so as to cover almostthe entire face of a housing at a sufficiently narrow interval, adetection means that detects disconnection of the electric wire, and amemory provided in the housing. When the disconnection of the electricwire is detected, the detection unit erases the data in the memory. As aresult, the secret information in the memory is prevented from beinganalyzed.

CITATION LIST Patent Literature

Patent Literature 1: JP-A-2013-3979

Patent Literature 2: JP-A-2008-33593

SUMMARY OF INVENTION

As described above, the information processing apparatus which handlessecret information is required to have physical tamper proof. An objectof the present disclosure is to provide an information processingapparatus with improved tamper proof and a method of manufacturing thesame.

An information processing apparatus according to the present disclosureincludes a circuit board that has an electronic device, a first contactand a pin hole; a cover that covers the electronic device and the firstcontact on the circuit board; and a case that accommodates the circuitboard and the cover. The cover includes a second contact that is incontact with the first contact, a tampering detection wiring that isconnected to the second contact and that is a wiring for tamperingdetection of the cover, a through hole that absorbs dimensionaltolerance, and a positioning pin that corresponds to the pin hole of thecircuit board. The cover is attached to a back face of the case byinserting a predetermined screw into the through hole, and is positionedby inserting the positioning pin into the pin hole on the circuit board.

A method of manufacturing an information processing apparatus isprovided according to the present disclosure. The information processingapparatus includes a circuit board that has an electronic device, afirst contact and a pin hole, a cover that covers the electronic deviceand the first contact on the circuit board, a second contact that isprovided on the cover and is contact with the first contact, a tamperdetection wiring that is provided on the cover and that is a wiring fortampering detection connected to the second contact, a through hole thatis provided on the cover and that absorbs dimensional tolerance, apositioning pin that is provided on the cover and that corresponds tothe pin hole of the circuit board, and a case that accommodates thecircuit board and the cover. The method includes the steps of: insertingthe positioning pin into the pin hole of the circuit board; andattaching the cover to a back face of the case by inserting apredetermined screws into the through holes

According to the present disclosure, an information processing apparatusand a method of manufacturing the same can be provided.

BRIEF DESCRIPTION OF DRAWINGS

FIGS. 1A to 1C are views showing a configuration example of a settlementterminal according to the present embodiment, FIG. 1A is a top view,FIG. 1B is a side view, and FIG. 1C is a front view.

FIG. 2 is a view showing a configuration example of the informationprocessing apparatus according to the present embodiment, and is anexploded perspective view of the information processing apparatus asviewed obliquely from above.

FIG. 3 is a view showing a configuration example of the informationprocessing apparatus according to the present embodiment, and is anexploded perspective view of the information processing apparatus asviewed obliquely from below.

FIG. 4 is a view showing an example of attachment of a protective coverto a case using a stepped screw.

DESCRIPTION OF EMBODIMENTS

Hereinafter, embodiments of the present disclosure will be described indetail with reference to the drawings. However, unnecessarily detaileddescription may be omitted. For example, detailed description ofwell-known matters and repeated description of substantially the sameconfigurations may be omitted. This is to avoid unnecessary redundancyin the following description and to facilitate understanding of thoseskilled in the art. The accompanying drawings and the followingdescription are provided for those skilled in the art to fullyunderstand the present disclosure, and are not intended to limit thesubject matter of the claims.

Present Embodiment Settlement Terminal

FIGS. 1A to 1C are views showing a configuration example of a settlementterminal according to the present embodiment, FIG. 1A is a top view,FIG. 1B is a side view, and FIG. 1C is a front view.

The settlement terminal 1 is a terminal corresponding to at least anelectronic settlement, and is placed and used on a placement face a suchas a counter of a store, for example. As shown in FIG. 1A, thesettlement terminal 1 includes a substantially box-shaped housing 10.

The settlement terminal 1 may be a composite type settlement terminalcapable of selecting a plurality of settlement methods by a user whoperforms electronic settlement. The settlement terminal 1 has asettlement mechanism for a user to select a settlement method andperform settlement. For example, as shown in FIGS. 1A to 1C, thesettlement terminal 1 includes, as a settlement mechanism, a slot 11 forsettlement of a magnetic card, a slot 12 for settlement of a contact ICcard, and a touch face 13 for contact-less settlement, in this orderfrom a bottom face 15 upward on one end side of the housing 10. Inaddition, the settlement terminal 1 includes an operation mechanism foran employee and the like of the store to perform settlement approval andthe like. For example, as shown in FIG. 1B, the settlement terminal 1includes, as an operation mechanism, an operation screen 14 on the otherend side of the housing 10 (that is, on the opposite side of thesettlement mechanism).

For example, a user inserts and slides a magnetic card into the slot 11for magnetic card settlement. The user inserts a contact IC card 16 intothe slot 12 for settlement of the contact IC card. The user holds acontact-less type IC card over the touch face 13 for contact-lesssettlement. The employee of the store operates the operation screen 14of the settlement terminal 1 to determine the card settlement of theuser.

The settlement terminal 1 includes an information processing apparatus100 for performing settlement processing inside the housing 10. Theinformation processing apparatus 100 which handles secret informationsuch as settlement processing is required to have high security againstphysical attacks from the outside. That is, the information processingapparatus 100 is required to have high tamper proof. The informationprocessing apparatus 100 having enhanced tamper proof will be describedbelow.

For convenience of description, as shown in FIGS. 1A to 1C, an axisperpendicular to the bottom face 15 of the housing 10 is defined as a Zaxis. An axis perpendicular to the Z axis (that is, parallel to thebottom face of the housing 10) from the operation mechanism side to thesettlement mechanism side of the housing 10 is defined as the X axis. Anaxis orthogonal to the X axis and the Z axis is defined as a Y axis. Forconvenience of description, there is a case where the positive directionof the X axis is referred to as “front”, the negative direction of the Xaxis is referred to as “rear”, the positive direction of the Y axis isreferred to as “right”, the negative direction of the Y axis is referredto as “left”, the positive direction of the Z axis is referred to as“upper”, and the negative direction of the Z axis is referred to as“lower”. Note that the expressions relating to these directions are usedfor convenience of description and are not intended to limit the postureof the structure in actual use.

Information Processing Apparatus

FIG. 2 is a view showing a configuration example of the informationprocessing apparatus according to the present embodiment, and is anexploded perspective view of the information processing apparatus asviewed obliquely from above. FIG. 3 is a view showing a configurationexample of the information processing apparatus according to the presentembodiment, and is an exploded perspective view of the informationprocessing apparatus as viewed obliquely from below. Next, theinformation processing apparatus will be described in detail withreference to FIGS. 2 and 3.

The information processing apparatus 100 includes a card connector 110,a circuit board 120, a protective cover 130, and a case 140.

The card connector 110 is a flat, substantially rectangularparallelepiped electronic device into which the IC card 16 is inserted.In the card connector 110, a card slot 111 as an insertion opening ofthe IC card 16 is formed on the front face (face in the positivedirection of the X axis). The card slot 111 corresponds to the slot 12for settlement of the contact type IC card in FIG. 1. The card connector110 reads information of the inserted IC card 16, and transmits the readinformation to an IC chip (not shown) that performs settlementprocessing on the circuit board 120.

The circuit board 120 is, for example, a printed circuit board (PCB),and includes a printed wiring (not shown) and one or more electroniccomponents on a top face. A card connector 110 is attached to thecircuit board 120 as one of electronic components. An IC chip isattached to the circuit board 120 as an example of the electroniccomponents. The tamper detection circuit (not shown) is attached to thecircuit board 120 as one of the IC chips.

The tamper detection circuit monitors a signal flowing through a tamperdetection wiring, which will be described later, and detects adisconnection and a short circuit of the tamper detection wiring. Thetamper refers to a physical attack from the outside for the purpose ofanalyzing or falsifying secret information. An example of the tamper isa probing attack in which an elongated probe is inserted from theoutside to analyze or falsify a signal. When a disconnection or a shortcircuit of the tamper detection wiring is detected, the tamper detectioncircuit performs a process for preventing the analysis and falsificationof the secret information. For example, the tamper detection circuitstops the operation of the IC chip and erases information in the memory.As a result, the tamper by the attacker can be prevented.

The circuit board 120 includes a tamper detection wiring (not shown) fortamper detection with respect to the circuit board 120. The tamperdetection wiring is electrically connected to the tamper detectioncircuit. The circuit board 120 has one or more board-side contacts 121.The circuit board-side contacts 121 are electrically connected to thetamper detection circuit.

The protective cover 130 is a component for covering and protecting thecard connector 110 and the circuit board-side contacts 121 on thecircuit board 120 from above. The protective cover 130 may have asubstantially rectangular main face 131 parallel to the circuit board120 and side faces 132A, 132B, and 132C extending in the direction ofthe circuit board 120 from three sides of the main face 131respectively. Herein, a portion where the side faces 132A, 132B, and132C in the protective cover 130 are not present is referred to as anopening portion 133. The opening portion 133 is formed so as not tointerfere with the insertion of the IC card 16 of the card connector 110in a case where the protective cover 130 is disposed on the top face ofthe circuit board 120.

The protective cover 130 includes cover-side contacts 134 on the bottomface of the main face 131 at positions in contact with the circuitboard-side contacts 121 when disposed on the circuit board 120. Thepositions and number of the cover-side contacts 134 may be positions andnumbers corresponding to one-to-one with the circuit board-side contacts121.

The protective cover 130 includes a tamper detection wiring (not shown)on the entire face. The tamper detection wiring may be wired in a wiringpattern that covers the entire face of the protective cover 130 in asnake shape with signal stroke. The tamper detection wiring may beformed by a laser direct structuring (LDS) method. The tamper detectionwiring is electrically connected to the cover-side contacts 134. Thus,the tamper detection wiring of the protective cover 130 is electricallyconnected to the tamper detection circuit through the cover-sidecontacts 134 and the circuit board-side contacts 121. Therefore, thetamper detection circuit can detect tamper with respect to theprotective cover 130.

The case 140 is disposed to face the top face of the circuit board 120,and accommodates the circuit board 120 and the protective cover 130.Also, the case 140 may be engaged with a case (not shown) disposed toface the bottom face of the circuit board 120.

In the present embodiment, the protective cover 130 is attached to thebottom face of the case 140 without being attached to the circuit board120. Thereby, when the case 140 is detached, the protective cover 130attached to the case 140 is also detached together, and the cover-sidecontacts 134 of the protective cover 130 are separated from the circuitboard-side contacts 121 of the circuit board 120. That is, thecover-side contacts 134 are in a contact-less state (that is, anelectrical disconnected state) with the circuit board-side contacts 121.Therefore, the tamper detection circuit can detect the opening of thecase 140. According to this configuration, both the tamper proof to thecard connector 110 and the opening detection of the case 140 can beachieved by one protective cover 130. Therefore, it is not necessary toprovide a new component for detecting the opening of the case 140, andthe cost of the tamper proof can be reduced.

By reducing the area of the cover-side contacts 134 and the circuitboard-side contacts 121, it is difficult for the attacker to bring theprobe into contact with the cover-side contacts 134 and the circuitboard-side contacts 121, and thus the tamper proof of the protectivecover 130 is improved. However, reducing the area of the cover-sidecontacts 134 and the circuit board-side contacts 121 make it difficultto bring the cover-side contacts 134 and the circuit board-side contacts121 into contact with each other due to dimensional tolerance and thelike. In particular, as described above, in the configuration in whichthe protective cover 130 is attached to the case 140, the dimensionaltolerance between the case 140 and the protective cover 130 and thedimensional tolerance between the protective cover 130 and the circuitboard 120 are accumulated, so that there is a high possibility that thecover-side contacts 134 and the circuit board-side contacts 121 having asmall area are not in contact with each other.

Therefore, in the following description, in a configuration in which theprotective cover 130 is attached to the case 140 as described above, aconfiguration for reducing the possibility that the cover-side contacts134 and the circuit board-side contacts 121 having a relatively smallarea will be not in contact with each other in will be described.

As shown in FIGS. 2 and 3, a right side face 132A of the protectivecover 130 is provided with an extending portion 135A extendingrightward, and a left side face 132B of the protective cover 130 isprovided with an extending portion 135B extending leftward. Throughholes 136A and 136B are formed in the extending portions 135A and 135B.

As shown in FIG. 3, on the bottom face of the case 140, a screw hole141A is provided at a position corresponding to the through hole 136A ofthe protective cover 130, and a screw hole 141B is provided at aposition corresponding to the through hole 136B of the protective cover130.

FIG. 4 is a view showing an example of attachment of the protectivecover 130 to the case 140 by stepped screws 150. As shown in FIG. 4, thestepped screw 150 includes a head portion 151, a neck portion 152 inwhich no screw groove is formed, and a threaded groove portion 153 inwhich a screw groove is formed.

As shown in FIGS. 2 to 4, the protective cover 130 is inserted into thethrough holes 136A and 136B, and is attached to the case 140 by thestepped screws 150 screwed into screw holes 141A and 141B of the case140.

As shown in FIG. 4, the diameter of the through holes 136A, 136B isgreater than the diameter of the neck portion 152 of the stepped screw150 and less than the diameter of the head portion 151 of the steppedscrew 150. The difference 160 between the diameters of the through holes136A, 136B and the diameter of the neck portion 152 of the stepped screw150 may be greater than or equal to the dimensional tolerance betweenthe protective cover 130 and the case 140. That is, the diameters of thethrough holes 136A, 136B may be a length that allows the dimensionaltolerance between the protective cover 130 and the case 140.

Thus, the protective cover 130 is fixed in the upper-lower direction (Zaxis direction), and can move freely in the direction (XY planedirection) parallel to the bottom face of the case 140 within a range ofthe difference 160 between the diameter of the through hole 136 of theprotective cover 130 and the diameter of the neck portion 152 of thestepped screw 150.

In addition, as shown in FIGS. 2 and 3, the protective cover 130includes two positioning pins 137A, 137B projecting downward on thesides of the side faces 132A, 132B which are brought into contact withthe circuit board 120. For example, the two positioning pins 137A, 137Bare provided at positions of substantially vertical angles as shown inFIGS. 2 and 3. In the top face of the circuit board 120, pin holes 122A,122B are formed at positions corresponding to the positioning pins 137A,137B of the protective cover 130. The positions of the two positioningpins 137A, 137B (and the pin holes 122A, 122B of the circuit board 120)are not limited to the above examples, and may be any position on theside which is brought into contact with the circuit board 120 of theprotective cover 130.

According to the configuration of the circuit board 120, the protectivecover 130, and the case 140 described above, the information processingapparatus 100 can be manufactured by the following manufacturingprocess.

(Step 1) The manufacturer aligns the positions of the through holes136A, 136B of the protective cover 130 with the positions of the screwholes 141A, 141B of the case 140.

(Step 2) The manufacturer inserts the stepped screws 150 into thethrough holes 136A, 136 B and screws into the screw holes 141A, 141B toattach the protective cover 130 to the case 140.

(Step 3) The manufacturer inserts the positioning pins 137 of theprotective cover 130 into the pin holes 122 of the circuit board 120 toassemble the circuit board 120, the protective cover 130, and the case140.

In Step 3, since the protective cover 130 is movable in the paralleldirection (XY plane direction) with respect to the bottom face of thecase 140, the dimensional tolerance between the protective cover 130 andthe case 140 is absorbed by the movement. Therefore, the area of thecircuit board-side contacts 121 and the cover-side contacts 134 can bedetermined in consideration of dimensional tolerance between theprotective cover 130 and the circuit board 120 without considering thedimensional tolerance between the protective cover 130 and the case 140.That is, the area of the circuit board-side contacts 121 and thecover-side contacts 134 can be reduced to the dimensional tolerancebetween the protective cover 130 and the circuit board 120.

According to the configuration described above, the informationprocessing apparatus 100 with improved temper proof in which both thetamper proof to the card connector 110 and the opening detection of thecase 140 can be achieved by one protective cover 130, and the area ofthe circuit board-side contacts 121 and the cover-side contacts 134 isreduced.

Conclusion of Present Disclosure

The information processing apparatus (100) according to the presentdisclosure includes: a circuit board (120) having an electronic device,a first contact (121), and a pin hole (122A, 122B); a cover (130) thatcovers the electronic device and the first contact on the circuit board;and a case (140) that accommodates the circuit board and the cover. Thecover includes a second contact (134) brought into contact with thefirst contact, a tampering detection wiring that is connected to thesecond contact and that is a wiring for tampering detection of thecover, a through hole (136A, 136B) that absorbs dimensional tolerance,and a positioning pin (137A, 137B) corresponding to the pin hole on thecircuit board. The cover is attached to a back face of the case byinserting a predetermined screw into the through hole, and is positionedby inserting the positioning pin into the pin hole on the circuit board.The predetermined screw may be a stepped screw (150). The electronicdevice may be a card connector (110).

According to the above configuration, when the case (140) is removed,since the cover (130) is also removed together, both tamper to theelectronic device (for example, the card connector (110)) and openingdetection of the case can be achieved by one cover. In addition, sincethe cover is attached to the back face of the case by a predeterminedscrew (e.g., a stepped screw (150)) inserted into the through hole(136A, 136B) that allows dimensional tolerance, the cover is movable ina direction parallel to the back face of the case. Therefore, thedimensional tolerance between the cover and the case are absorbed bythis movement, so the area of the circuit board-side contacts (121) andthe cover-side contacts (134) can be reduced to dimensional tolerancebetween the cover and the circuit board. That is, the area of thecircuit board-side contacts and the cover-side contacts can be reducedto increase the tamper proof.

Although the embodiments have been described above with reference to theaccompanying drawings, the present disclosure is not limited to suchexamples. Those skilled in the art will recognize that various changes,modifications, substitutions, additions, deletions, and equivalents maybe made within the scope of the appended claims, and are understood tobelong to the technical scope of the present disclosure. In addition,constituent elements in the above-described embodiments may bearbitrarily combined within a range not departing from the gist of theinvention.

INDUSTRIAL APPLICABILITY

The technology of the present disclosure is useful in a device that isrequired to be tamperproof.

1. An information processing apparatus comprising: a circuit board thathas an electronic device, a first contact, and a pin hole; a cover thatcovers the electronic device and the first contact on the circuit board;and a case that accommodates the circuit board and the cover, whereinthe cover includes: a second contact that is in contact with the firstcontact; a tampering detection wiring that is connected to the secondcontact and that is a wiring for tampering detection of the cover; athrough hole that absorbs dimensional tolerance; and a positioning pinthat corresponds to the pin hole of the circuit board, and the cover isattached to a back face of the case by inserting a predetermined screwinto the through hole, and is positioned by inserting the positioningpin into the pin hole on the circuit board.
 2. The informationprocessing apparatus according to claim 1, wherein the predeterminedscrew is a stepped screw.
 3. The information processing apparatusaccording to claim 1, wherein the electronic device is a card connector.4. A method of manufacturing an information processing apparatus, theinformation processing apparatus including: a circuit board that has anelectronic device, a first contact, and a pin hole; a cover that coversthe electronic device and the first contact on the circuit board; asecond contact that is provided on the cover and is contact with thefirst contact; a tamper detection wiring that is provided on the coverand that is a wiring for tampering detection connected to the secondcontact; a through hole that is provided on the cover and that absorbsdimensional tolerance; a positioning pin that is provided on the coverand that corresponds to the pin hole of the circuit board; and a casethat accommodates the circuit board and the cover, the methodcomprising: inserting the positioning pin into the pin hole of thecircuit board; and attaching the cover to a back face of the case byinserting a predetermined screw into the through hole.